Milling machine



1623,801 Aprll 5, 1927. H. W. MEM-NG MILLING MACHINE 2 Sheets-Sheet. l

Filed Sept. 28, 1925 April 5 1927' H. w. Mam/ ING MILLING MACHINE Filed Sent. 28. 1923 2 Sheets-Sheet 2 Y gvwenl'oz #6mm/wam; Y

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Patented Apr. 5, 1927.

I, HERMAN W. MELLING, 0F JACKSON, MICHIGAN.

Fics.-

MILLING MACHINE.

Application filed September 28, 1923. Serial No. 665,348.

This invention relates milling machines.

The main objects of'this invention are:

First, to pr-ovide a machine for milling or machining cam shafts such as are used in internal combustion engines.

Second, to provide an improved milling machine for work of non-circular cross section.

Third, to provide an improved -milling machine of the class .described which is of lar e capacity. v

bjects pertaining to'det'ails and economies of construction and operation of my improvements will definitely appear from the detaileddescription to follow.

I accomplish the objects of my invention by the devices and means described in the following specification.l The invention is clearly defined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearly illustrated to improvements in in the accompanying drawing forming apart of this ap lication, in which:

Fig. I is a ront perspective view of a milling machine -embodying the features of my invention, a portion of the frameA being broken away.

Fig. II is a vertical transverse section on a line corresponding to line 2-2 of Fig. I.

Fig. III is a fragmentary front perspective view looking from the left of Fig. I.

Fig. IV is a vertical transverse section through the work and the cutter shaft showing the coacting relation of the cutter and work. l

Fig. V is a detail View, partially in section, on a line corresponding to line 5-5 of Flg. IV.

Fig. VI is a detail section of the driving gears for the work-spindle and cutter shaft.

In the drawing similar reference numerals indicate .similar parts throughout the several views and the sectional views are taken looking in the .direction of the little arrows at the ends of the section lines.

Referring to the' drawing, the bed 1 is provided with a suitable way 2 for the carriage 3. The carriage is mounted on this wa for longitudinal or forward movement an alsoy for lateral adjustment to regulate the depth of cut sothat a roughing cut and a finishing cut may be had, both movements of t-he carriage being on the single way 2.

The carriage is held yieldingly against its to be adjusted to ing cut.

adjusting cams 5 by the springs 4, wear plates 6 being interposed between the springs and the carriage. A single spring and cam .is illustrated. This cam isshaped to permit the carrlage to move to neutral position, or

a roughing cutI or a finish- I have not in the accompanying drawing attempted to maintain the relative proportion of these parts.

The carriage is provided with a head stock 7 and atail stock 8, the head stock having a live spindle 9 provided with a chuck shown conventionally at 10 for the work y1l, the work illustrated being a cam shaft such as is used in internal combustion engines. This cam shaft has a plurality of cams disposed in a non-aligning relation.

The cutter shaft 12 is mounted on the bearing pedestals 13 supported in adjusted position by means of the bolts 14, adjusting screws 15 being provided for these bearing pedestals. The shaft 12 is connected to the live spindle 9 by means of a train of gears 16, the gearing being such that the spindle 9 and the shaft 12 are driven at the same speed and in the same direction.

The cutters 17 are mounted upon the shaftA 12 in a spaced relation corresponding to that of the cams'on the work so lthat the several cutters operate on the several cams as the work is carried along or fed by the feeding movement of the work carriage. This is effected, in the structure illustrated, by means of the cam 18 on the shaft 19, cams 20 being provided on the shaft 19 to actuate the shaft 21v of the cams 5, the shaft 21 having an arm 22 coacting with the cam 20.

In the structure illustrated the cams have circular portions A concentric with the axis of the shaft and lift portions comprising the parts B1, B2 and C. These lift portions are non-concentric with the axis of the work. The cutters 17 are complementary to the finished work, the cutters having portions a concentric with the axis of the cutter shaft and portions b1, b2 and c non-concentric therewith, the portions b and bzbeing made up of a single inserted tooth. These teeth b1 and b2 have .a lathe tool action cutting the parts B1 and Bz of the work. It is, therefore, with insertable teeth as more material is removed by these teeth than by the other teeth of thecutters.-

In Figs. IV and V the work is shown with desirable to provide the cutters l chining WorkV having a portion concentric a cam partially cut, the stock commonly used cutter' being provided with inserted teeth for cam shafts being drop forgings which at the points where its contour changes are roughly shaped. My improved machine 4. The combination in a machine for niaremoves the desired amount of stockand chining cams having circular dwell portions produces accurate shape or outline. I l concentric with the axis of the cam and lifts, My improved milling machine is of large the sides of which are non-concentric with capacity and may be successfully operated by others than skilled mechanics. circular contour comprising a portion con- I have illustrated and described my imcentric with the axis ofy the cutter and a provements in an embodiment which I find portion non-concentric therewith and invery practical.y I have not attempted to ilserted blades between such portions, and lustrate or describe certain embodiments or means for driving said cutter and work at adaptations which I contemplate as I bethe same speed and inthe same direction.

lieve the disclosure made will enable those 5. The combination in a machine formaskilled in the art to which my invention rechining cams having circular dwell portions lates to embody or adapt the same as may be concentric with the axis of the cams and lifts, desired. the sides of which are non-concentricl with My Patent #1,569,518 issued Jan. .12, the axis of the cam, a cutter having a non- 1926, for milling machine, discloses certain circular contour comprising a portion conof the features of this-application. -cent'ric with the axis of the cutter and a por- Having thus described my invention what tion non-concentric therewith and inserted I claim as new and desire to secure by Letblades between such portions, and means for ters Patent is: A driving said cutter and Pwork in synchrol. The combination in a machine for manism.

6. In a structure of the class described, to the axis of the work and a portion nonthe combination of means for rotatably supconcentric therewith, of work supplorting porting work of non-circular contour, a milland driving means, a cutter of non-circular ing cutter having a non-circular contour and contour complementary to the work to he provided with inserted teeth at the points machined, said cutter having a portion conwhere its contour changes, and means for centric with its axis and a portion non-condriving the Work and cutter in synchronism. centric therewith, and having inserted teeth 7. The combination in a machine for mabetvveen its concentric and non-concentric chining cams having lifts non-concentric portions, and means for driving said cutter With the axis of the cam, of a cutter having and work in synchronism. a perlpheral portion of non-circular contour 2. The combination in a machine for macomplementary to that of the lift of the chining work having a portion concentric to Work, said cutter having inserted blades at the axis of the work and a portion non-conthe ends of its said complementary portion, centric therewith, a cutter of non-circular and means for driving said cutter and the contour complementary to the work t0 be work in synchronism and in the same direcmachined, said cutter having a portion contion. r centric with its axis and a portion non-con- 8. The combination in a machine for macentric therewith, and having inserted teeth chining cams having lifts non-concentric between its concentric and non-concentric with the axisof the cam, of a cutter having aportions, and means for driving said cutter peripheral portion of non-circular contour and work in synchronism. complementary to that of the lift of the 3. In a structure of the class described, Work, said cutterhaving inserted blades at the combination of means for rotatably supthe ends of its said complementary portion,- porting work of non-circular contour, a milland means for drlvingsaid cutter and the ingl cutter having anon-circular contour work 1n synchronism.

complementary to that of the work, and In witness whereof, I have .hereunto set means for driving said work and cutter in my hand.

synchronism and in the same direction,.said HERMAN W. MELLING.

the axis of the cam, la cutter having a non- 

